文献类型：期刊文献

英文题名：Analysis of synergistic effect between graphene and octahedral cuprous oxide in cuprous oxide-graphene composites and their photocatalytic application

作者：Zhang, Wei[1];Ma, Yujie[1];Yang, Zhi[1];Tang, Xuehui[1];Li, Xiaolin[1];He, Guili[1];Cheng, Yuqiao[2];Fang, Zebo[3];He, Rong[1];Zhang, Yafei[1]

机构：[1]Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Dept Micro Nano Elect, Key Lab Thin Film & Microfabricat,Minist Educ, Shanghai 200240, Peoples R China;[2]Tianjin Polytech Univ, Sch Environm & Chem Engn, Tianjin 300387, Peoples R China;[3]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2017

卷号：712

起止页码：704

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：SCI-EXPANDED(收录号：WOS:000401881000091)、、EI(收录号：20171603588936)、Scopus(收录号：2-s2.0-85017642694)、WOS

基金：The authors gratefully acknowledge financial supports by the National Natural Science Foundation of China (61671299, 51272159 and 81270209), Shanghai Science and Technology Grant (16JC1402000), the Program of Shanghai Academic/Technology Research Leader (15XD1525200), and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (GZ2016005). We also acknowledge analysis support from the Instrumental Analysis Center of Shanghai Jiao Tong University and the Center for Advanced Electronic Materials and Devices of Shanghai Jiao Tong University.

语种：英文

外文关键词：Octahedral cuprous oxide-graphene; One-pot synthesis; Photocatalytic performance; Synergistic effect; Photocatalytic mechanism

外文摘要：The octahedral cuprous oxide (Cu2O) supported by reduced graphene oxide composites (Cu2O-RGO) are compounded via a gentle one-pot in situ method. The reduction of GO and the growth of octahedral Cu2O particles simultaneously occur with the Cu2O particles depositing on RGO nanosheets uniformly. The enhanced photocatalytic properties are appraised by decomposition of methyl orange under visible light irradiation. Compared with the pure octahedral Cu2O particles and RGO, the as-prepared composites degrade methyl orange completely within 50 min with apparent rate constant at 82.88 x 10(-3) min(-1), ten times of the pure octahedral Cu2O particles and twenty-seven times of RGO. Scavengers are also introduced to investigate the photocatalytic mechanism which turns out that h(+) and center dot O-2 radicals are the main active species in the photocatalysis process. The synergistic effect between RGO and octahedral Cu2O particles in the photocatalysis process is systematacially analyzed for the first time. Carrier generation occurs on the Cu2O particle, and electron is collected and transported by graphene here to prolong the charge carriers' lifetime, leading to strong absorbance in visible light region, instant carrier separation, and fast charge transfer. Thus the efficiency of visible-light-driven photocatalysis is greatly enhanced. (C) 2017 Elsevier B.V. All rights reserved.